Tobias suspects that the Archbishop of Canterbury may have a dimmer view of our polity than we do. In particular, Tobias suspects that Rowan Williams does not appreciate that our House of Deputies has so much authority in relation to our House of Bishops, and the General Convention as a whole. I don't know if this is true of Rowan, but I have heard this very thing voiced to me by other leaders from other non-U.S. Anglican provinces.
It may not come as a surprise that much of what we are seeing in today's divisions stems from differing values about what constitutes and who constitutes authority in the church. To be sure, the Church of England is still an established old-world church, and The Episcopal Church is the first Anglican Communion church to arise in a context of classical liberalism -- what more need be said?
The Church of England still has crown-appointed bishops. As well, in other parts of the communion, especially in the GAFCON provinces, for example, we see Anglican churches constituted in national contexts where classical liberalism has hardly taken any hold at all. Classical liberalism, again, is that particular bundle of ideas which gave rise to the United States' constitution, etc.
I find it no surprise at all therefore, that we see structural differences which are pretty major. What is amazing, in fact, is that more than two centuries ago the Archbishops of York and Canterbury consecrated William White to the episcopate, presumably knowing that he was the author of our deeply 'liberal' ecclesiastical framework.
Now, this all being said, I am still not sure that we in The Episcopal Church need be at all smug or superior vis a vis the depth of classical liberalism in our ecclesiastical dna. Indeed, the individualist ideology at the heart of liberalism, and the very 'political' machinations which describe so much of our own goings on, are edges where faithful critics of our church might have a good place to start.